This article introduces the connotation and implication of maintaining a proper look-out,puts forward the idiographic methods and measures.

This dissertation demonstrates that marine accidents are mainly due to the failure of proceeding at a safe speed and maintaining a proper look-out according to the statistics and analysis of marine traffic accidents.

the process of lookout at sea is the process of collecting and processing information at sea with its focus on detecting and screening relevant information that threatens ships safety.

Based on common knowledge that one decides the highest point of mountains by outlook,by employing supervision mechanism of outlook,strategies of generating outlook points and mechanisms of constructing and solving local problems,outlook algorithm can solve any global optimization problem in a relatively short time.